Touch sensitive IPS liquid crystal display

ABSTRACT

A touch sensitive in-plane switching (IPS) liquid crystal display (LCD) includes a liquid crystal layer, an active-matrix transistor layer with an electrode pair, a color filter substrate, and a sensing electrode layer. The sensing electrode layer may be disposed above or below the color filter substrate, and the sensing electrode layer may include two parts that are disposed above and below the color filter layer respectively.

CROSS-REFERENCE TO RELATED APPLICATIONS

The entire contents of Taiwan Patent Application No. 098120566, filedJun. 19, 2009, from which this application claims priority, areincorporated herein by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention generally relates to a touch panel, and moreparticularly to a touch sensitive in-plane switching (IPS) liquidcrystal display (LCD).

2. Description of the Related Art

Touch panels and touch screens have been widely used in electronicdevices, particularly portable and hand-held electronic devices such aspersonal digital assistants (PDA) and mobile telephones. Touch panelsincorporate sensing technology (such as resistive, capacitive, oroptical sensing technology) and display technology. Maturing liquidcrystal display (LCD) developments further facilitate the integration ofsensing technologies with the LCD.

FIG. 1 is a cross-sectional view showing the structure of a conventionaltouch sensitive LCD 9, as disclosed, for example, in U.S. Pat. No.6,259,490 entitled “LIQUID CRYSTAL DISPLAY DEVICE” or U.S. PatentApplication Publication No. 2007/0242054A1 entitled “LIGHT TRANSMISSIONTOUCH PANEL AND MANUFACTURING METHOD THEREOF.” As shown in FIG. 1, thetouch sensitive LCD 9 includes, from bottom to top, a thin-filmtransistor (TFT) substrate 1, a liquid crystal (LC) layer 2, a commonelectrode layer 3, a color resist (CR) layer 4, a color filter (CF)substrate 5, a sensing electrode layer 6, and a polarizing plate 7.According to the structure of the conventional touch sensitive LCD 9, inwhich both the common electrode layer 3 and the sensing electrode layer6 are disposed above the LC layer 2, high background capacitanceadversely affect the sensing electrode layer 6, thereby decreasing theperformance and accuracy of the touch sensitive LCD 9. Furthermore,regarding the structure of the conventional touch sensitive LCD 9, anelectric field of the LC layer 2 also adversely affects the touchperformance and accuracy of the sensing electrode layer 6.

As the conventional touch sensitive LCD suffers from suboptimal sensingperformance and accuracy, a need exists to propose a novel touchsensitive LCD that is capable of providing one or more of improvedsensing performance and accuracy.

SUMMARY OF THE INVENTION

In view of the foregoing, embodiments of the present invention provide atouch sensitive in-plane switching (IPS) liquid crystal display (LCD),which is operative to improve sensing performance and accuracy. Theembodiments disclose structures concerning a sensing electrode layer,which for example can be free of or less affected by high backgroundcapacitance. Moreover, the embodiments disclose substitution or sharingbetween a composing layer of the LCD and the sensing electrode layer.Furthermore, a shielding layer is disclosed for reducing anelectric-field effect on the sensing electrode layer from the liquidcrystal (LC) layer.

The IPS LCD, according to the embodiments of the present invention,includes a liquid crystal layer, an active-matrix transistor layer withan electrode pair (e.g., a pixel electrode and a common electrode), acolor filter substrate, and a sensing electrode layer. According to afirst embodiment, the sensing electrode layer may be disposed above thecolor filter substrate. According to a second embodiment, the sensingelectrode layer may be disposed below the color filter substrate.According to a third embodiment, the sensing electrode layer may includetwo parts that are disposed above and below the color filter layerrespectively.

Aspects of the embodiments embody the sensing electrode layer asincluding multiple electrode layers or a single electrode layer.According to an aspect of some embodiments, the connecting conductiveline of the sensing electrode layer may be shared with a black matrixlayer, and an insulating layer may be shared with a color resist layer.According to a further aspect, the shielding layer may be shared with ablack matrix layer.

BRIEF DESCRIPTION OF THE DRAWINGS

Many aspects of the present embodiments can be better understood withreference to the following drawings. The components in the drawings arenot necessarily to scale, emphasis instead being placed upon clearlyillustrating the principles of the present implementations. In thedrawings, like reference numerals are used to designate correspondingparts throughout the several views.

FIG. 1 is a cross-sectional view showing the structure of a conventionaltouch sensitive liquid crystal display (LCD);

FIG. 2 is a cross-sectional view of a touch sensitive in-plane switching(IPS) LCD according to a first embodiment of the present invention;

FIG. 3 is a cross-sectional view of a touch sensitive IPS LCD accordingto a second embodiment of the present invention;

FIG. 4 is a cross-sectional view of a touch sensitive IPS LCD accordingto a third embodiment of the present invention;

FIG. 5A is a top view showing an electrode pattern of multiple electrodelayers;

FIG. 5B is a top view showing an electrode pattern of a single electrodelayer;

FIG. 5C is a top view showing another electrode pattern of multipleelectrode layers;

FIG. 6A and FIG. 6B show an electrode pattern of multiple electrodelayers, in which two axial sensing electrodes are disposed on differentlevels respectively;

FIG. 7A and FIG. 7B show another electrode pattern of multiple electrodelayers, in which two axial sensing electrodes are disposed on the samelevel;

FIG. 7C shows an alternative structure of the electrode pattern of FIG.7A;

FIG. 7D is a cross-sectional view taken along a section line 7D-7D′ ofFIG. 7C;

FIG. 8A and FIG. 8B show a further electrode pattern of multipleelectrode layers, in which two axial sensing electrodes are disposed onthe same level;

FIG. 8C shows an alternative structure of the electrode pattern of FIG.8A;

FIG. 8D is a cross-sectional view taken along a section line 8D-8D′ ofFIG. 8C;

FIG. 9A and FIG. 9B show an electrode pattern of a single electrodelayer; and

FIG. 10 is a cross-sectional view of a touch sensitive IPS LCD includinga shielding layer.

DETAILED DESCRIPTION OF THE INVENTION

FIG. 2 is a cross-sectional view of a touch sensitive in-plane switching(IPS) liquid crystal display (LCD) 100A, abbreviated as the touchsensitive display hereinafter, according to a first embodiment of thepresent invention. Terms such as “above”/“below” and “top”/“bottom” inthis specification are used to represent relative directions. Withrespect to the figures accompanying this description, tops and bottomsof the depicted touch sensitive displays appear nearer to and furtherfrom the viewer respectively. Capacitive sensing is utilized in theembodiments of the present invention to detect touch positions accordingto capacitance variations at the touch points of a user's finger orstylus.

The structure and display mode of the touch sensitive display accordingto the present embodiments implement IPS, which is distinct from otherdisplay modes owing at least to the following differences. Both thecommon electrode layer and the pixel electrode of the IPS LCD aredisposed below the liquid crystal (LC) layer, while the common electrodelayer and the pixel electrode of other type LCDs are disposed above andbelow the LC layer respectively. Due to the specific structure of theIPS LCD, background capacitance can be reduced, thereby decreasing orpreventing the disturbance affecting sensing capability, and improvingsensing performance and accuracy.

According to the first embodiment shown in FIG. 2, the touch sensitivedisplay 100A includes, from bottom to top, an active-matrix transistor(such as thin-film transistor or TFT) substrate 10, an LC layer 12, anover coating (OC) layer 14, a color resist (CR) layer 16, a color filter(CF) substrate 18, a sensing electrode layer 20, and a polarizing plate22. An additional layer or layers may be inserted between theaforementioned composing layers according to particular applications orfunctions. Specifically, an electrode pair can be at, or set (e.g.,disposed) on, the TFT substrate 10. The electrode pair includes a pixelelectrode and a common electrode. A laterally horizontal electric fieldis generated between the pixel electrode and the common electrode forcontrolling the orientation of the liquid crystals of the LC layer 12 toachieve an IPS display mode. The OC layer 14 is used to prevent the ionsof the CR layer 16 from entering into and thus contaminating the LClayer 12. The OC layer 14 may contain acryl resin, epoxy resin, and/oranother material. The CR layer 16 may contain Poly-vinyl alcohol (PVA),acryl pigment, and/or another pigment/dye for forming a red/green/blue(RGB) color pattern. The CF substrate 18 is a transparent substrate thatmay contain glass, high molecular plastic (such as Polycarbonate (PC) orPolyvinylchloride (PVC)), and/or another material. The polarizing plate22 may contain PVA and/or another material. The structure and thematerial of the sensing electrode layer 20 will be discussed later inthe specification.

One aspect of the first embodiment (FIG. 2) is that, with respect tostructure, the sensing electrode layer 20 is disposed between the CFsubstrate 18 and the polarizing plate 22, or, in other words, above theCF substrate 18. Specifically, the sensing electrode layer 20 isdisposed above the first (top) surface 18A of the CF substrate 18, andthe CR layer 16 is disposed below the second (bottom) surface 18B of theCF substrate 18.

FIG. 3 is a cross-sectional view of a touch sensitive IPS LCD 100Baccording to a second embodiment of the present invention. In theembodiment, the touch sensitive display 100B includes, from bottom totop, an active-matrix transistor (such as TFT) substrate 10, an LC layer12, an OC layer 14, a sensing electrode layer 20, a CF substrate 18, anda polarizing plate 22. A CR layer 16 may be disposed between the OClayer 14 and the sensing electrode layer 20; or may be disposed betweenthe sensing electrode 20 and the CF substrate 18; or may even bedisposed in the sensing electrode layer 20, as indicated by the arrows.An additional layer or layers may be inserted between the aforementionedcomposing layers according to particular applications or functions.

One aspect of the second embodiment (FIG. 3) is that, with respect tostructure, the sensing electrode layer 20 is disposed between the CFsubstrate 18 and the OC layer 14, or, in other words, below the CFsubstrate 18. Specifically, the sensing electrode layer 20 is disposedbelow the second (bottom) surface 18B of the CF substrate 18, and thepolarizing plate 22 is disposed above the first (top) surface 18A of theCF substrate 18.

FIG. 4 is a cross-sectional view of a touch sensitive IPS LCD 100Caccording to a third embodiment of the present invention. In theembodiment, the touch sensitive display 100C includes, from bottom totop, an active-matrix transistor (such as TFT) substrate 10, an LC layer12, an OC layer 14, a first (I) sensing electrode layer 20A, a CFsubstrate 18, a second (II) sensing electrode layer 20B, and apolarizing plate 22. A CR layer 16 may be disposed between the OC layer14 and the first sensing electrode layer 20A; or may be disposed betweenthe first sensing electrode 20A and the CF substrate 18, as indicated bythe arrows. An additional layer or layers may be inserted between theaforementioned composing layers according to the particular applicationor function.

One aspect of the third embodiment (FIG. 4) is that, with respect tostructure, the sensing electrode layer is divided into two parts: thefirst sensing electrode layer 20A and the second sensing electrode layer20B, which are disposed between the OC layer 14 and the CF substrate 18and between the CF substrate 18 and the polarizing plate 22,respectively. Specifically, the second sensing electrode layer 20B isdisposed above the first (top) surface 18A of the CF substrate 18, andthe first sensing electrode layer 20A is disposed below the second(bottom) surface 18B of the CF substrate 18.

With respect to the aspects of the first, the second, and the thirdembodiment, the sensing electrode 20 of the first embodiment (FIG. 2) isdisposed above the CF substrate 18; the sensing electrode 20 of thesecond embodiment (FIG. 3) is disposed below the CF substrate 18; andthe first and the second sensing electrode 20A/20B of the thirdembodiment (FIG. 4) are disposed below and above the CF substrate 18,respectively.

With respect to the sensing electrode layer 20/20A/20B of theembodiments (FIG. 2/FIG. 3/FIG. 4), the sensing electrode layer20/20A/20B may include multiple electrode layers or a single electrodelayer. Each electrode layer may include a number of sensing electrodes.The electrode layer may include transparent conductive material such as,but not limited to, Indium Tin Oxide (ITO), Aluminum Zinc Oxide (AZO),and/or Indium Zinc Oxide (IZO). FIG. 5A is a top view showing anelectrode pattern of multiple electrode layers, which include firstsensing electrodes 201A along a first axis (e.g., X axis) and secondsensing electrodes 202A along a second axis (e.g., Y axis). Firstconnecting conductive line (or bridging conductive line) 201B isconnected between the neighboring first sensing electrodes 201A alongthe first axis, and second connecting conductive line 202B is connectedbetween the neighboring second sensing electrodes 202A along the secondaxis. In the exemplary figure, the sensing electrodes 201A and 202Ahave, but are not limited to, a shape of rhombus. In general, no matterwhether the first sensing electrode 201A and the second sensingelectrode 202A are located on the same level or not, insulating materialneed be disposed between the overlapping connecting conductive lines201B and 202B in order to prevent shorting in an overlapping areabetween the lines 201B and 202B. The X and Y coordinates of a touchpoint may be detected according to the second-axis sensing electrodes202A and the first-axis sensing electrodes 201A. The multiple electrodelayers exemplified in FIG. 5A may be adapted to act as the sensingelectrode layer 20 in the touch sensitive display 100A of the firstembodiment (FIG. 2) or the touch sensitive display 100B of the secondembodiment (FIG. 3). Further, the first-axis sensing electrodes 201A andthe second-axis sensing electrodes 202A may be adapted to act as thefirst sensing electrode layer 20A and the second sensing electrode layer20B, respectively, of the touch sensitive display 100C of the thirdembodiment (FIG. 4). In this specification, the terms “first-axis,”“X-axis,” and “first” may be used interchangeably, and the terms“second-axis,” “Y-axis,” and “second” may be used interchangeably. Theaforementioned connecting conductive line 201B or the first-axis sensingelectrode 201A may be substituted with a black matrix (BM) layer.

FIG. 5B is a top view showing an electrode pattern of a single electrodelayer, which includes a number of elongated sensing electrodes 203A thatare spaced apart from each other. The two ends of each sensing electrode203A are coupled to conductive lines 203B respectively (or,alternatively, a single conductive line 203B that is integrated witheach sensing electrode 203A). Whenever the sensing electrode 203A istouched, two ends of the sensing electrode 203A result in differentimpedance values respectively and may then be utilized to detect Xcoordinate, and the location of the sensing electrode 203A is used todetect Y coordinate. The single electrode layer exemplified in FIG. 5Bmay be adapted to act as the sensing electrode layer 20 in the touchsensitive display 100A of the first embodiment (FIG. 2) or the touchsensitive display 100B of the second embodiment (FIG. 3).

FIG. 5C is a top view showing another electrode pattern of multipleelectrode layers, which include first-axis (e.g., X-axis) elongatedfirst sensing electrodes 206 that are parallelly spaced apart from eachother and second-axis (e.g., Y-axis) elongated second sensing electrodes207 that are parallelly spaced apart from each other. The X and Ycoordinates of a touch point may be detected according to the elongatedfirst sensing electrodes 206 and the elongated second sensing electrodes207. Insulating material may or need be disposed between the elongatedfirst sensing electrodes 206 and the elongated second sensing electrodes207 in order to prevent shorting between the electrodes 206 and 207. Themultiple electrode layers exemplified in FIG. 5C may be adapted to actas the sensing electrode layer 20 in the touch sensitive display 100A ofthe first embodiment (FIG. 2) or the touch sensitive display 100B of thesecond embodiment (FIG. 3). Further, the elongated first sensingelectrodes 206 and the elongated second sensing electrodes 207 may beadapted to act as the first sensing electrode layer 20A and the secondsensing electrode layer 20B, respectively, of the touch sensitivedisplay 100C of the third embodiment (FIG. 4).

Some structures implementing the electrode pattern of the sensingelectrode layer 20/20A/20B are disclosed as follows. FIG. 6A and FIG. 6Bshow an electrode pattern of multiple electrode layers, in which twoaxial sensing electrodes are disposed on different levels respectively.FIG. 6A is a partially enlarged view of FIG. 5A, and FIG. 6B is across-sectional view along a section line 6B-6B′ of FIG. 6A. Accordingto the figures, Y-axis electrode layer (202A and 202B) is disposed on atop level, and X-axis electrode layer (201A and 201B) is disposed on abottom level. An insulating layer 204 is inserted between the top leveland the bottom level in order to prevent shorting between the connectingconductive lines 201B and 202B. With respect to the second embodiment(FIG. 3), the insulating layer 204 may be substituted and shared with a(insulating) CR layer 16. Although the electrode exemplified in FIG. 6Bincludes, from bottom to top, the X-axis electrode layer (201A and201B), the insulating layer 204, and the Y-axis electrode layer 202A, itis appreciated that the forming sequence may be inverted (that is, theY-axis electrode layer, the insulating layer, and the X-axis electrodelayer from bottom to top), and associated drawings and description areomitted for brevity.

FIG. 7A and FIG. 7B show another electrode pattern of multiple electrodelayers, in which two axial sensing electrodes are disposed on the samelevel. FIG. 7A is a partially enlarged view of FIG. 5A, and FIG. 7B is across-sectional view along a section line 7B-7B′ of FIG. 7A. Accordingto the figures, X-axis electrode layer 201A and Y-axis electrode layer202B are disposed on the same level. An insulating layer 204 in a formof an isolation island covers the Y-axis electrode layer 202B in orderto prevent shorting in an overlapping area between the connectingconductive lines 201B and 202B. Conductive material, such as metal orITO, covers the insulating layer 204 to act as the X-axis connecting (orbridging) conductive line 201B. With respect to the second embodiment(FIG. 3), the insulating layer 204 may be substituted and shared with an(insulating) CR layer 16. The connecting conductive line 201B may besubstituted with a (conductive) BM layer. Although the electrodeexemplified in FIG. 7B includes, from bottom to top, the X/Y-axiselectrode layer (201A and 202B), the insulating layer 204, and theconnecting conductive line 201B, it is appreciated that the formingsequence may be inverted (that is, the connecting conductive line 201B,the insulating layer 204, and the X/Y-axis electrode layer (201A and202B) from bottom to top), and associated drawings and description areomitted for brevity.

FIG. 7C shows an alternative structure of FIG. 7A. Compared to FIG. 7A,the X-axis connecting conductive line 201B in FIG. 7C is a continuousline that extends along the X-axis electrodes 201A of the same row. TheX-axis connecting conductive line 201B and the Y-axis connectingconductive line 202B may include the same or different material(s). FIG.7D is a cross-sectional view along a section line 7D-7D′ of FIG. 7C.

FIG. 8A and FIG. 8B show a further electrode pattern of multipleelectrode layers, in which two axial sensing electrodes are disposed onthe same level. FIG. 8A is a partially enlarged view of FIG. 5A, andFIG. 8B is a cross-sectional view along a section line 8B-8B′ of FIG.8A. According to the figures, X-axis electrode layer 201A and Y-axiselectrode layer 202B are disposed on the same level. An insulating layer204 blanket covers the X/Y-axis electrode layer (201A and 202B) in orderto prevent shorting in an overlapping area between the connectingconductive lines 201B and 202B. A via hole 205 is formed in theinsulating layer 204 used for communicating between the X-axis sensingelectrodes 201A, and the X-axis connecting conductive line 201B (such asmetal or ITO) may be communicated with the X-axis sensing electrode 201Athrough the via hole 205. With respect to the second embodiment (FIG.3), the insulating layer 204 may be substituted and shared with an(insulating) CR layer 16. The connecting conductive line 201B may besubstituted with a (conductive) BM layer. Although the electrodeexemplified in FIG. 8B includes, from bottom to top, the X/Y-axiselectrode layer (201A and 202B), the insulating layer 204, and theconnecting conductive line 201B, it is appreciated that the formingsequence may be inverted (that is, the connecting conductive line 201B,the insulating layer 204, and the X/Y-axis electrode layer (201A and202B) from bottom to top), and associated drawings and description areomitted for brevity.

FIG. 8C shows an alternative structure of FIG. 8A. Compared to FIG. 8A,the X-axis connecting conductive line 201B in FIG. 8C is a continuousline that extends along the X-axis electrodes 201A of the same row. TheX-axis connecting conductive line 201B and the Y-axis connectingconductive line 202B may include same or different material(s). FIG. 8Dis a cross-sectional view along a section line 8D-8D′ of FIG. 8C.

FIG. 9A and FIG. 9B show an electrode pattern of a single electrodelayer. FIG. 9A is a partially enlarged view of FIG. 5B, and FIG. 9B is across-sectional view along a section line 9B-9B′ of FIG. 9A. Accordingto the figures, two ends of the sensing electrode 203A are coupled toconductive line 203B respectively (or, alternatively, a singleconductive line 203B that is integrated with the sensing electrode203A). The resistivity value of the conductive line 203B is usuallylower than that of the sensing electrode 203A. For example, theconductive line 203B may include metal, and the sensing electrode 203Amay include ITO. With respect to the second embodiment (FIG. 3), thesensing electrode 203A may include a combination/compound of a BM layerand a transparent conductive layer.

According to another aspect of the present invention, at least oneshielding layer 24 may be disposed between the sensing electrode layer(20/20A/20B) and the LC layer 12 for the purpose of preventing thesensing electrode layer (20/20A/20B) from being adversely affected bythe electric field of the LC layer 12, as shown in the touch sensitivedisplay of FIG. 10. An insulating layer 26 (such as glass, CR layer,and/or other insulating material(s)) may be disposed between theshielding layer 24 and the sensing electrode layer (20/20A/20B) in orderto prevent shorting between the shielding layer 24 and the sensingelectrode layer (20/20A/20B). As the BM layer usually includes a meshstructure, the shielding layer may accordingly be substituted and sharedwith a BM layer with adequate mesh density.

Although specific embodiments have been illustrated and described, itwill be appreciated by those skilled in the art that variousmodifications may be made without departing from the scope of thepresent invention, which is intended to be limited solely by theappended claims.

What is claimed is:
 1. A touch sensitive in-plane switching (IPS) liquidcrystal display (LCD), comprising: a liquid crystal layer; anactive-matrix transistor substrate disposed below the liquid crystallayer; an electrode pair positioned or set on the active-matrixtransistor substrate, the electrode pair comprising a pixel electrodedisposed below the liquid crystal layer and a common electrode disposedbelow the liquid crystal layer, wherein a laterally horizontal electricfield is generated between the pixel electrode and the common electrodefor controlling orientation of liquid crystals of the liquid crystallayer in an IPS display mode; a color filter substrate disposed abovethe liquid crystal layer; a sensing electrode layer disposed between thecolor filter substrate and the liquid crystal layer; and a black matrixlayer disposed between the liquid crystal layer and the sensingelectrode layer, wherein the black matrix layer performs as a shieldinglayer for preventing an electric interference between the liquid crystallayer and the sensing electrode layer.
 2. The display of claim 1,wherein the sensing electrode layer comprises: a first-axis electrodelayer comprising a plurality of first sensing electrodes, wherein afirst: connecting conductive line is connected between the neighboringfirst sensing electrodes along a first axis; and a second-axis electrodelayer comprising a plurality of second sensing electrodes, wherein asecond connecting conductive line is connected between the neighboringsecond sensing electrodes along a second axis; wherein the firstconnecting conductive line is electrically insulated from thecorresponding second connecting conductive line.
 3. The display of claim2 wherein the first connecting conductive line is made of a metalmaterial or ITO.
 4. The display of claim 2, wherein the first-axiselectrode layer or the second-axis electrode layer is made of atransparent conductive material.
 5. The display of claim 1, wherein thesensing electrode layer includes a multiple electrode layer or a singleelectrode layer.
 6. The display of claim 2, wherein the first-axiselectrode layer and the second-axis electrode layer are disposed ondifferent levels respectively, and an insulating layer is insertedbetween the first-axis electrode layer and the second-axis electrodelayer.
 7. The display of claim 6, wherein the insulating layer betweenthe first-axis electrode layer and the second-axis electrode layer is acolor resist layer.
 8. The display of claim 2, wherein the first sensingelectrodes and the second sensing electrodes disposed on a same level;and an isolation island is formed or set into an overlapping areabetween the first connecting conductive line and the second connectingconductive line in order to electrically insulate the first connectingconductive line from the second connecting conductive line.
 9. Thedisplay of claim 8, wherein the isolation island is a color resistlayer.
 10. The display of claim 2, wherein the first sensing electrodesand the second sensing electrodes are disposed on a same level; and aninsulating layer electrically insulates the first connecting conductiveline from the second connecting conductive line, wherein a via hole isformed in the insulating layer used for communicating the first sensingelectrodes therebetween, and the first connecting conductive lineelectrically connects with the first sensing electrodes through the viahole.
 11. The display of claim 10, wherein the insulating layer is acolor resist layer.
 12. The display of claim 1, wherein the sensingelectrode layer comprises a plurality of sensing electrodes that arespaced apart from each other and arranged in parallel along one axis,wherein two ends of each of the sensing electrodes are coupled to aconductive line.
 13. The display of claim 12, wherein the electricresistivity value of each of the sensing electrodes is lower than theelectric resistivity value of the conductive line.
 14. The display ofclaim 1, wherein the sensing electrode layer comprises: a plurality ofelongated first sensing electrodes that are spaced apart from each otherin parallel along a first axis; and a plurality of elongated secondsensing electrodes that are spaced apart from each other in parallelalong as second axis; wherein the elongated first sensing electrodes areelectrically insulated from the elongated second sensing electrodes. 15.The display of claim 1, further comprising a dielectric layer disposedbetween the sensing electrode layer and the black matrix layer.
 16. Thedisplay of claim 15, wherein the black matrix layer includes a meshstructure.